because most people couldn't read or write in he olden days, vicars decided to put some scenes from the bible onto the windows so that people could learn about Jesus without having to beable to read or write.
The basic idea is that glass is made out of heated sand, which is silicon dioxide and the key part of that is the silicon.
Chemicals for making common glass are Silica (silicon dioxide, the glassy part), and Sodium Carbonate (Soda Ash), lowers the melting point.
In a church, it's usually called a rosette window, but it could also be a mandella.
The price of a custom stained glass window depends on the quality of materials, complexity of design and company offering window. They can cost anywhere from 150$ to 1,700$.
Probably. The liturgical arts were thought by the first Lutherans, like those today, to be great aides to worship and learning. That includes statuary, music, carvings, architecture, stained glass and ritual posture. It was the puritanical reforms, which Luther and his fellow reformers rejected, that purged Churches of the Sacred Arts.
Make a cartoon that outlines the design of the window.
Probably at the same time that glass itself was invented. The sand from which glass is made naturally contains minerals that will cause the glass to be colored. The earliest glass made was was not clear but strongly colored (often dark, sometimes even nearly opaque).
The first glass makers therefor began working simultaneously in two opposite directions to make various types of glass that they wanted:
The purpose is not specifically recorded, and has been the subject of much commentary. In my opinion, the purpose was to light the church in a way that was primarily decorative. Rose windows had no pictures or words on them and were purely decorative. You will read that stained glass windows were a way of teaching the Bible to illiterate people, but if you go into a medieval church and look up at the windows, you will see that they pretty much all look alike, and can be distinguished best by the words that were painted and fired onto the glass.
I have provided a link to an article on medieval stained glass below. You can look at the pictures there and decide for yourself whether the idea was more educational or more decorative.
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We do not know who invented stained glass, but it was probably invented in western Europe in the Early Middle Ages. Colored glass had been used earlier for various purposes, and colored designs made of substances other than glass had been used in window areas, but we have no record or evidence of stained glass windows.
The earliest known reference to stained glass dates from 675 AD, at which time workers from France are recorded to have been brought to the monastery of St Peter at Monkwearmouth to glaze the windows.
There is a link below.
Lead, in the form of lead oxide, PbO, is added to glass to stabilize the matrix and improve the working characteristics of the glass. As a flux, PbO lowers the melting point considerably, and it also decreases the viscosity of the material. Additionally, lead oxide changes (increases) the refractive index of the glass. Use the link below to check facts and learn more.
It has 21. You take the number of letters in the word and multiply it by the number of vowels. So for this word you multiply 7 by 3 and that is 21.